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Cross-talk measurement apparatus with near-end compensation

  • US 5,532,603 A
  • Filed: 01/27/1995
  • Issued: 07/02/1996
  • Est. Priority Date: 01/27/1995
  • Status: Expired due to Term
First Claim
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1. In an instrument for measuring a cross-talk response in a pair of transmission lines, a method for removing undesired cross-talk effects from at least one selected location along said pair of transmission lines, comprising:

  • (a) generating stimulus signals to one of said pair of transmission lines;

    (b) receiving cross-talk signals from another of said pair of transmission lines and digitizing said cross-talk signals as a pulse-response time record wherein said cross-talk signals are produced in response to said stimulus signals;

    (c) constructing an undesired-response time record from said pulse-response time record containing only said undesired cross-talk effects corresponding to said selected location;

    (d) calculating a first frequency domain representation of said pulse-response time record and a second frequency domain representation of said undesired-response time record; and

    (e) calculating said cross-talk response by subtracting said second frequency domain representation from said first frequency domain representation.

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